Answers for "c# get username of process"

c# get username of process

//-----------------------------------------
// Very fast non-WMI process username search
// import System.Security.Principal
// and System.Runtime.InteropServices
// for this to work
//-----------------------------------------

	private static string GetProcessUser(Process process)
    {
        IntPtr processHandle = IntPtr.Zero;
        try
        {
            OpenProcessToken(process.Handle, 8, out processHandle);
            WindowsIdentity wi = new WindowsIdentity(processHandle);
            string user = wi.Name;
            return user.Contains(@"\") ? user.Substring(user.IndexOf(@"\") + 1) : user;
        }
        catch
        {
            return null;
        }
        finally
        {
            if (processHandle != IntPtr.Zero)
            {
                CloseHandle(processHandle);
            }
        }
    }

    [DllImport("advapi32.dll", SetLastError = true)]
    private static extern bool OpenProcessToken(IntPtr ProcessHandle, uint DesiredAccess, out IntPtr TokenHandle);
    [DllImport("kernel32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool CloseHandle(IntPtr hObject);